When heaviness is the only suppression mechanism, as in split
supersymmetry [1]}, the squarks are very heavy
and supersymmetry no longer solves the fine tuning problemWhen the first two squark generations are mildly heavy and the
third generation is light, as in effective supersymmetry
[2]}, the fine tuning problem is still solved, but
additional suppression mechanisms are needed..
If we want to maintain supersymmetry as a solution to the fine tuning
problem, either degeneracy, or alignment, or a combination of both is
needed. This means that the flavour structure of supersymmetry is not
generic, as argued in the previous section.
